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Working with Quality of Service (QoS)
QoS policy is configured for each WM-AD and applies to routed, bridged at AP, and bridged at
controller WM-ADs.
Each WM-AD has a configurable policy for the QoS characteristics of the WM-AD. For every user
associated with the WM-AD there will be a different behavior on the wireless traffic.
NOTE
Active QoS is only applied on the wireless/802.11 domain, not on the wired domain.
QoS Modes
You can enable the following Qos modes for a WM-AD:
Legacy – If enabled, the AP will classify and prioritize the downlink traffic for all clients according
●
to the same rules used for the WMM and 802.11e.
WMM – If enabled, the AP will accept WMM client associations, and will classify and prioritize the
●
downlink traffic for all WMM clients. WMM clients will also classify and prioritize the uplink traffic.
802.11e – If enabled, the AP will accept WMM client associations, and will classify and prioritize the
●
downlink traffic for all 802.11e clients. The 802.11e clients will also classify and prioritize the uplink
traffic.
Turbo Voice – If any of the above QoS modes are enabled, the Turbo Voice mode is available. If
●
enabled, all the downlink traffic that is classified to the Voice (VO) AC and belongs to that WM-AD
is transmitted by the AP via a queue called Turbo Voice (TVO) instead of the normal Voice (VO)
queue. The TVO queue is tailored in terms of contention parameters and number of retries to
maximize voice quality and voice capacity.
All combinations of the three modes are valid. The following table summarizes all possible
combinations:
Table 14: QoS Mode Combinations
Legacy mode
Configuration
WMM mode
802.11e mode
To legacy client
Traffic that is
classified and
From legacy client
prioritized
To WMM client
From WMM client
To 802.11e client
From 802.11e
client
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Working with Quality of Service (QoS)
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